WebAPI学习(七)：IOC框架AutoFac

1. 项目Nuget中引入

   Autofac.Extensions.DependencyInjection
   Autofac.Extras.DynamicProxy

   

2. 在Business文件夹下新增AutofacRegister.cs 并继承与Autofac.Module，重新Load方法

   public class AutofacRegister : Autofac.Module
    {
        protected override void Load(ContainerBuilder builder)
        {
            //注册Service
            var assemblysServices = Assembly.Load("TEST.Services");
            builder.RegisterAssemblyTypes(assemblysServices)
                .InstancePerDependency() // 瞬时单例
                .AsImplementedInterfaces() //自动以实现的所有接口类型暴露(包括IDisposable接口)
                .EnableInterfaceInterceptors(); //引用Autofac.Extras.DynamicProxy;
   
            //注册Repository
            var assemblyRepository = Assembly.Load("TEST.Respository");
                 builder.RegisterAssemblyTypes(assemblyRepository)
                .InstancePerDependency() // 瞬时单例
                .AsImplementedInterfaces() //自动以实现的所有接口类型暴露(包括IDisposable接口)
                .EnableInterfaceInterceptors(); //引用Autofac.Extras.DynamicProxy;
   
   
        }
    }

3.  在Program.cs中注入Autofac

   //注入Autofac
   builder.Host.UseServiceProviderFactory(new AutofacServiceProviderFactory())
       .ConfigureContainer<ContainerBuilder>(builder =>
       {
           //调用程序集注册存入方法
           builder.RegisterModule(new AutofacRegister());
       });

4. 在BaseServices里改造下，直接通过构造函数注入

   //public IBaseRepository<TEntity> baseDal = new BaseRepository<TEntity>();
   
   private readonly IBaseRepository<TEntity> baseDal;
   
   /// <summary>
   /// 构造函数
   /// </summary>
   /// <param name="baseDal"></param>
   public BaseServices(IBaseRepository<TEntity> baseDal)
   {
       this.baseDal = baseDal;
   }

5. StudentServices中也要改下

   private readonly IStudentRepository _studentRepository;
   
   /// <summary>
   /// 构造函数
   /// </summary>
   /// <param name="baseDal"></param>
   /// <param name="studentRepository"></param>
   public StudentServices(IBaseRepository<Student> baseDal,IStudentRepository studentRepository):base(baseDal)
   {
       _studentRepository = studentRepository;
   }

6. 新建接口读取所有学生信息来验证Autofac 

         IStudentService

/// <summary>
/// 查询所有学生列表
/// </summary>
/// <returns></returns>
Task<List<Student>> GetStudents();

         StudentService

/// <summary>
/// 查询所有学生列表
/// </summary>
/// <returns></returns>
public async Task<List<Student>> GetStudents()
{
    return await _studentRepository.Query();
}

         StudentController

/// <summary>
/// 获取所有学生列表
/// </summary>
/// <returns></returns>
[HttpPost]
public async Task<IActionResult> GetStudents()
{
    var students = await stuService.GetStudents();
    return Ok(students);
}

运行项目